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authorDavid Howells <dhowells@redhat.com>2006-10-11 01:22:14 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 11:14:25 -0700
commitedc666e2ff9ec2e4e9510f1127c68c22cffc93f6 (patch)
tree21d139e520a4a7fa79464bbe46e3df145a231d27
parent9e42ef777f62277ea9bb70976be65bb374e00b9c (diff)
[PATCH] ReiserFS: Make sure all dentries refs are released before calling kill_block_super()
Make sure all dentries refs are released before calling kill_block_super() so that the assumption that generic_shutdown_super() can completely destroy the dentry tree for there will be no external references holds true. What was being done in the put_super() superblock op, is now done in the kill_sb() filesystem op instead, prior to calling kill_block_super(). Changes made in [try #2]: (*) reiserfs_kill_sb() now checks that the superblock FS info pointer is set before trying to dereference it. Signed-off-by: David Howells <dhowells@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/reiserfs/super.c31
1 files changed, 20 insertions, 11 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index c89aa2338191..9041802df832 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -430,20 +430,29 @@ int remove_save_link(struct inode *inode, int truncate)
return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
}
-static void reiserfs_put_super(struct super_block *s)
+static void reiserfs_kill_sb(struct super_block *s)
{
- struct reiserfs_transaction_handle th;
- th.t_trans_id = 0;
+ if (REISERFS_SB(s)) {
+ if (REISERFS_SB(s)->xattr_root) {
+ d_invalidate(REISERFS_SB(s)->xattr_root);
+ dput(REISERFS_SB(s)->xattr_root);
+ REISERFS_SB(s)->xattr_root = NULL;
+ }
- if (REISERFS_SB(s)->xattr_root) {
- d_invalidate(REISERFS_SB(s)->xattr_root);
- dput(REISERFS_SB(s)->xattr_root);
+ if (REISERFS_SB(s)->priv_root) {
+ d_invalidate(REISERFS_SB(s)->priv_root);
+ dput(REISERFS_SB(s)->priv_root);
+ REISERFS_SB(s)->priv_root = NULL;
+ }
}
- if (REISERFS_SB(s)->priv_root) {
- d_invalidate(REISERFS_SB(s)->priv_root);
- dput(REISERFS_SB(s)->priv_root);
- }
+ kill_block_super(s);
+}
+
+static void reiserfs_put_super(struct super_block *s)
+{
+ struct reiserfs_transaction_handle th;
+ th.t_trans_id = 0;
/* change file system state to current state if it was mounted with read-write permissions */
if (!(s->s_flags & MS_RDONLY)) {
@@ -2156,7 +2165,7 @@ struct file_system_type reiserfs_fs_type = {
.owner = THIS_MODULE,
.name = "reiserfs",
.get_sb = get_super_block,
- .kill_sb = kill_block_super,
+ .kill_sb = reiserfs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};